HABITAT SELECTION AND SITE FIDELITY OF CANADA WARBLERS (<i>WILSONIA CANADENSIS</i>) IN CENTRAL NEW HAMPSHIRE

Hallworth, Michael T.; Ueland, Amy; Anderson, Erik; Lambert, J. Daniel; Reitsma, Leonard R.

doi:10.1525/auk.2008.07115

Cited by 37 publications

(58 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is important to note that we did not assess the association between habitat and demography, which is crucial to better understanding potential population trajectories under alternative land use scenarios (Johnson 2007). In New Hampshire, the Canada Warbler demonstrated similar reproductive performance in early and late seral habitats as long as the understory structure was similar (Hallworth et al 2008a, b, Reitsma et al 2008. In contrast, Canada Warblers were less persistent in younger forest stands in Minnesota, suggesting reproductive success may have been lower in these stands (Grinde and Niemi 2016).…”

Section: Discussionmentioning

confidence: 99%

“…Declines appear more prominent in eastern than western North America (Rich et al 2004, Reitsma et al 2010, Sauer et al 2014) and may reflect regional differences in habitat associations and local drivers on both the breeding and wintering grounds. In the east, Canada Warblers breed in young forest stands, mature swamp forests, and mature riparian forests with a dense shrub understory and emergent song-perch trees (Hallworth et al 2008a, b, Reitsma et al 2008, Goodnow and Reitsma 2011). Canada Warblers are also associated with forest disturbance that creates suitable understory conditions, particularly at higher elevations and in the southern portion of their range Faccio 2005, Becker et al 2012).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Regional habitat needs of a nationally listed species, Canada Warbler (Cardellina canadensis), in Alberta, Canada

Ball¹,

Sólymos²,

Schmiegelow³

et al. 2016

ACE

View full text Add to dashboard Cite

ABSTRACT. Understanding factors that affect the distribution and abundance of species is critical to developing effective management plans for conservation. Our goal was to quantify the distribution and abundance of Canada Warbler (Cardellina canadensis), a threatened old-forest associate in Alberta, Canada. The Canada Warbler has declined across its range, including in Alberta where habitat loss and alteration from urban expansion, forestry, and energy development are changing the forest landscape. We used 110,427 point count survey visits from 32,287 unique survey stations to model local-level (150-m radius circular buffers) and stand-level (564-m radius circular buffers) habitat associations of the Canada Warbler. We found that habitat supporting higher densities of Canada Warblers was locally concentrated yet broadly distributed across Alberta's boreal forest region. Canada Warblers were most commonly associated with older deciduous forest at the local scale, particularly near small, incised streams, and greater amounts of deciduous forest at the stand scale. Predicted density was lower in other forest types and younger age classes measured at the local scale. There was little evidence that local-scale fragmentation (i.e., edges created by linear features) influenced Canada Warbler abundance. However, current forestry practices in the province likely will reduce the availability of Canada Warbler habitat over time by cutting old deciduous forest stands. Our results suggest that conservation efforts aimed at Canada Warbler focus on retaining large stands of old deciduous forest, specifically stands adjacent to streams, by increasing the width of deciduous retention buffers along streams during harvest and increasing the size and number of old forest residual patches in harvested stands.Besoins régionaux en matière d'habitat d'une espèce inscrite sur la liste nationale d'espèces en péril, la Paruline du Canada (Cardellina canadensis), en Alberta, Canada RÉSUMÉ. La compréhension des facteurs qui influent sur la répartition et l'abondance d'une espèce est importante si l'on veut élaborer des plans de gestion efficaces pour sa conservation. L'objectif de notre étude était de quantifier la répartition et l'abondance de la Paruline du Canada (Cardellina canadensis), une espèce menacée associée aux forêts âgées en Alberta, Canada. Les effectifs de la Paruline du Canada ont diminué dans l'ensemble de son aire, y compris en Alberta où la perte et la modification d'habitat attribuables à l'étalement urbain, aux pratiques forestières et aux activités de développement énergétique modifient le paysage forestier. Nous avons utilisé 110 427 dénombrements à partir de 32 287 stations d'écoute afin de modéliser l'association de la Paruline du Canada avec l'habitat à l'échelle locale (rayon de 150 m autour de la station) et à celle du peuplement (rayon de 564 m autour de la station). Nous avons trouvé que les milieux qui hébergeaient les densités les plus élevées de Paruline du Canada étaient concentrés localement, mais aussi t...

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Regional habitat needs of a nationally listed species, Canada Warbler (Cardellina canadensis), in Alberta, Canada

Ball¹,

Sólymos²,

Schmiegelow³

et al. 2016

ACE

View full text Add to dashboard Cite

show abstract

“…For example, more and better options for nesting sites or the attraction of a higher quality mate are plausible options. On the other hand, there was a negative relationship between territory size and percent shrub cover, a habitat resource that seems to be selected by Canada Warblers (Hallworth et al 2008b, Goodnow and Reitsma 2011, Environment Canada 2016. In this case, territory size may depend on local habitat quality (Morris 2003) that arises through conspecific competition and territory defence (Stamps 1990, Ridley et al 2004, Adams 2001.…”

Section: Discussionmentioning

confidence: 99%

“…At times, location points were estimated based on the strength of the receiver signal (estimated accuracy ± 5 m). Each location point was recorded using a GPS unit (Garmin 76CSx), ensuring the accuracy was below ± 5 m. We attempted to collect a minimum of 40 location points for each individual and maintained a minimum of 10 minutes between observations to minimize the interdependence of the location points (Barg et al 2005, Hallworth et al 2008b). …”

Section: Territory Size and Breeding Successmentioning

confidence: 99%

“…To estimate shrub density, all shrubs (> 50 cm height, < 8 cm dbh) were counted within a 5-m radius of the plot centre. An estimation of the percent shrub cover (0 -50 cm above ground) and the percent shrub cover that was conifer was recorded in four quadrants of the 5-m radius circle (Hallworth et al 2008b). The percent shrub cover and percent shrub cover that was conifer was estimated as the mean of the four quadrants (Table 1).…”

Section: Vegetationmentioning

confidence: 99%

See 1 more Smart Citation

Factors driving territory size and breeding success in a threatened migratory songbird, the Canada Warbler

Flockhart¹,

Mitchell²,

Krikun³

et al. 2016

ACE

View full text Add to dashboard Cite

ABSTRACT. Successful conservation of migratory birds demands we understand how habitat factors on the breeding grounds influences breeding success. Multiple factors are known to directly influence breeding success in territorial songbirds. For example, greater food availability and fewer predators can have direct effects on breeding success. However, many of these same habitat factors can also result in higher conspecific density that may ultimately reduce breeding success through density dependence. In this case, there is a negative indirect effect of habitat on breeding success through its effects on conspecific density and territory size. Therefore, a key uncertainty facing land managers is whether important habitat attributes directly influence breeding success or indirectly influence breeding success through territory size. We used radio-telemetry, point-counts, vegetation sampling, predator observations, and insect sampling over two years to provide data on habitat selection of a steeply declining songbird species, the Canada Warbler (Cardellina canadensis). These data were then applied in a hierarchical path modeling framework and an AIC model selection approach to determine the habitat attributes that best predict breeding success. Canada Warblers had smaller territories in areas with high shrub cover, in the presence of red squirrels (Tamiasciurus hudsonicus), at shoreline sites relative to forest-interior sites and as conspecific density increased. Breeding success was lower for birds with smaller territories, which suggests competition for limited food resources, but there was no direct evidence that food availability influenced territory size or breeding success. The negative relationship between shrub cover and territory size in our study may arise because these specific habitat conditions are spatially heterogeneous, whereby individuals pack into patches of preferred breeding habitat scattered throughout the landscape, resulting in reduced territory size and an associated reduction in resource availability per territory. Our results therefore highlight the importance of considering direct and indirect effects for Canada warblers; efforts to increase the amount of breeding habitat may ultimately result in lower breeding success if habitat availability is limited and negative density dependent effects occur.Facteurs influant sur la taille du territoire et le succès reproducteur chez un passereau migrateur menacé, la Paruline du Canada RÉSUMÉ. La conservation réussie d'oiseaux migrateurs passe par la compréhension de l'influence qu'ont les composantes d'habitat des aires de nidification sur le succès reproducteur. Chez les passereaux territoriaux, de nombreuses composantes sont reconnues pour influer directement sur le succès reproducteur. Par exemple, la présence d'une grande disponibilité de nourriture et d'un faible nombre de prédateurs peut avoir des effets directs sur le succès reproducteur. Toutefois, bon nombre de ces mêmes composantes d'habitat peuvent aussi entrainer une densité d'individus c...

show abstract

Assessing conservation lands for forest birds in an exurban landscape

2017

View full text Add to dashboard Cite

Exurban development is the fastest growing type of land use in the United States and is prominent in the southern Appalachian region. A potential consequence of exurban development is the loss and fragmentation of wildlife habitat. We used a Bayesian model that accounts for false positive and false negative detections to make inferences about how the occupancy of 6 forest-dwelling, Neotropical migrant birds is related to multi-scale attributes of exurban development on land managed under 3 different conservation frameworks: national forest, land trust, or unprotected property in Macon County, North Carolina, USA during 2 breeding seasons. We performed Bayesian model selection and model averaging with a Bayesian Information Criterion weights approximation, and we evaluated models' predictive ability. We compared results from our occupancy model to those from a traditional model assuming data had no false positives. Results indicated that landscape-and local-scale covariates were more strongly related to posterior occupancy probabilities than site-scale covariates and that landscape composition and elevation were more strongly associated with occupancy probabilities than configuration. In particular, occupancy had a positive relationship with elevation and percent forest and a negative relationship with percent development. The black-throated blue warbler (Setophaga caerulescens) and wood thrush (Hylocichla mustelina) had the lowest posterior occupancy probabilities of the focal species, suggesting that these species may need particular conservation attention. National forest sites had high occupancy, but land trust sites exhibited patterns similar to unprotected sites. Our findings can provide guidance to county land use planners and land trusts as they respond to exurban development. Also, our study demonstrates the application of an improved occupancy model that can generate more accurate inference by accounting for both types of imperfect detection while describing heterogeneity across sites and survey occasions. Ó 2017 The Wildlife Society.

show abstract

HABITAT SELECTION AND SITE FIDELITY OF CANADA WARBLERS (WILSONIA CANADENSIS) IN CENTRAL NEW HAMPSHIRE

Cited by 37 publications

References 22 publications

Regional habitat needs of a nationally listed species, Canada Warbler (Cardellina canadensis), in Alberta, Canada

Regional habitat needs of a nationally listed species, Canada Warbler (Cardellina canadensis), in Alberta, Canada

Factors driving territory size and breeding success in a threatened migratory songbird, the Canada Warbler

Assessing conservation lands for forest birds in an exurban landscape

Contact Info

Product

Resources

About